> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ton.org/llms.txt
> Use this file to discover all available pages before exploring further.

<AgentInstructions>

## Submitting Feedback

If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:

POST https://docs.ton.org/feedback

```json
{
  "path": "/ecosystem/explorers/overview",
  "feedback": "Description of the issue"
}
```

Only submit feedback when you have something specific and actionable to report.

</AgentInstructions>

# Overview

Explorers are web tools for reading blockchain data. They let you look up accounts, transactions, blocks, and smart contracts, making it easy to verify activity and debug issues.

### Explorer

A blockchain explorer is a website that indexes on‑chain data and presents it in a searchable user interface (UI). In TON, explorers commonly show account balances, recent transactions, jettons and non‑fungible tokens (NFTs), contract code and state, and links to related blocks and messages.

### What explorers show

* Balances and assets: TON, jettons, and NFTs held by an address
* Transactions and messages: history, fees, phases, and traces
* Blocks and validators: block contents, masterchain and shardchain details
* Smart contracts: code, state, disassembly, and known contract type
* Analytics: top entities, volumes, gas, fees, and network health

### Indexers

Indexers continuously read blocks from nodes, parse messages and transactions, and store them in a database optimized for queries. Explorers rely on these indexers to provide fast search, traces, higher‑level events, and historical views beyond what a single node exposes by default.

### Explorers comparison

| Explorer     | Type            | Mainnet                                               | Testnet                                      | Official |
| ------------ | --------------- | ----------------------------------------------------- | -------------------------------------------- | -------- |
| Tonviewer    | General‑purpose | [tonviewer.com](https://tonviewer.com/)               | [Testnet](https://testnet.tonviewer.com/)    | No       |
| Tonscan.org  | General‑purpose | [tonscan.org](https://tonscan.org/)                   | [Testnet](https://testnet.tonscan.org/)      | No       |
| Tonscan.com  | General‑purpose | [tonscan.com](https://tonscan.com/)                   | -                                            | No       |
| TON Explorer | Low‑level/core  | [explorer.toncoin.org](https://explorer.toncoin.org/) | [Testnet](https://test-explorer.toncoin.org) | Yes      |

> Official: maintained by the TON Foundation or an affiliated team

The [verifier tool](https://verifier.ton.org/) powers contract code verification.